From 04ecde80f75430c92bf6692c7b39861045f5870e Mon Sep 17 00:00:00 2001
From: Will Deacon <will.deacon@arm.com>
Date: Tue, 23 Aug 2011 22:19:29 +0100
Subject: [PATCH] --- yaml --- r: 264615 b: refs/heads/master c:
 d6257288c4052465feeff7e283e35ec0ed06ca03 h: refs/heads/master i:   264613:
 6699e0416617f24d258dce7bd667da07a7105c28   264611:
 3201d55807113a8d704e998d56c5193c4ee66d7d   264607:
 a2881c20732b9937411621ea249d5de1b9ba4c69 v: v3

---
 [refs]                           |  2 +-
 trunk/arch/arm/include/asm/smp.h |  6 ++++++
 trunk/arch/arm/kernel/smp.c      | 15 +++++++++++++++
 3 files changed, 22 insertions(+), 1 deletion(-)

diff --git a/[refs] b/[refs]
index 147648bd652a..6939b48a4055 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: c9018aab8eee24b993c12c7aff7fc99d3d73f298
+refs/heads/master: d6257288c4052465feeff7e283e35ec0ed06ca03
diff --git a/trunk/arch/arm/include/asm/smp.h b/trunk/arch/arm/include/asm/smp.h
index e42d96a45d3e..674ebcd337fe 100644
--- a/trunk/arch/arm/include/asm/smp.h
+++ b/trunk/arch/arm/include/asm/smp.h
@@ -65,6 +65,12 @@ extern void platform_secondary_init(unsigned int cpu);
  */
 extern void platform_smp_prepare_cpus(unsigned int);
 
+/*
+ * Logical CPU mapping.
+ */
+extern int __cpu_logical_map[NR_CPUS];
+#define cpu_logical_map(cpu)	__cpu_logical_map[cpu]
+
 /*
  * Initial data for bringing up a secondary CPU.
  */
diff --git a/trunk/arch/arm/kernel/smp.c b/trunk/arch/arm/kernel/smp.c
index 62775c5c5ba0..3f12ce9b0796 100644
--- a/trunk/arch/arm/kernel/smp.c
+++ b/trunk/arch/arm/kernel/smp.c
@@ -40,6 +40,7 @@
 #include <asm/tlbflush.h>
 #include <asm/ptrace.h>
 #include <asm/localtimer.h>
+#include <asm/smp_plat.h>
 
 /*
  * as from 2.5, kernels no longer have an init_tasks structure
@@ -260,6 +261,20 @@ void __ref cpu_die(void)
 }
 #endif /* CONFIG_HOTPLUG_CPU */
 
+int __cpu_logical_map[NR_CPUS];
+
+void __init smp_setup_processor_id(void)
+{
+	int i;
+	u32 cpu = is_smp() ? read_cpuid_mpidr() & 0xff : 0;
+
+	cpu_logical_map(0) = cpu;
+	for (i = 1; i < NR_CPUS; ++i)
+		cpu_logical_map(i) = i == cpu ? 0 : i;
+
+	printk(KERN_INFO "Booting Linux on physical CPU %d\n", cpu);
+}
+
 /*
  * Called by both boot and secondaries to move global data into
  * per-processor storage.